curl --location --request POST 'https://saas-open.vhall.com/v3/interacts/sign/get-sign-in-user-list' \
--header 'platform;' \
--data-urlencode 'webinar_id=509154312' \
--data-urlencode 'sign_id=355051' \
--data-urlencode 'sort_type=asc' \
--data-urlencode 'pos=0' \
--data-urlencode 'limit=100' \
--data-urlencode 'app_key=' \
--data-urlencode 'sign_type=' \
--data-urlencode 'signed_at=' \
--data-urlencode 'sign='
{}